Oil & Gas
| Sat 02 Dec 2023
Beijing, Dec. 2 -- China Petroleum & Chem and Sinopec Northwest Oil Field have sought patent for mechanical rotary guiding device. This invention was developed by Li Shuanggui, Zhai Kejun, Yi Hao, Li Guangqiao, Jia Xiaobin, Liu Xiaomin, Zhang Jun, Yu Yang, Sun Weiguang, Chen Peiliang, Zhong Wenjian, He Yingzhuang, Yang Weixing a..